\documentclass{article}
\usepackage{amsmath}
\begin{document}
\pagestyle{empty}
\[
\begin{array}{lcc}
\lfloor f(0) \rfloor = 0  &\Rightarrow &  0 \le f(0) < 1  \\[1mm]
\lfloor f(1) \rfloor = 31 &\Rightarrow & 31 \le f(1) < 32 \\[1mm]
\lfloor f(2) \rfloor = 61 &\Rightarrow & 61 \le f(2) < 62 \\[1mm]
\lfloor f(3) \rfloor = 92 &\Rightarrow & 92 \le f(3) < 93 \\
                       & \vdots & \\
\lfloor f(11) \rfloor = 337 &\Rightarrow & 337 \le f(11) < 338
\end{array}
\]
\end{document}
